Background
Evolved Wireless sued Samsung in the Eastern District of Texas, alleging that Samsung mobile devices infringed claims 1, 3, 6, and 8 of U.S. Patent No. RE46,679. The patent concerns LTE handovers between base stations and, specifically, using a dedicated preamble during the random-access procedure to reduce collisions between mobile devices.
The district court granted Samsung partial summary judgment for products containing Qualcomm chips, concluding that those products remained covered by covenants arising from an LG-Qualcomm agreement. A jury then found that Samsung’s remaining products did not infringe, but that Samsung had not proved the asserted claims invalid. The district court denied Evolved’s request for a new infringement trial and Samsung’s motion for judgment as a matter of law based on lack of written description. Evolved appealed, and Samsung cross-appealed.
The Court’s Holding
The Federal Circuit affirmed the denial of a new infringement trial. Evolved had relied on a standards-based theory, which required it to show that every implementation of the LTE standard infringed. Samsung presented ample evidence that LTE-compliant devices could share preambles, use different timeslots, and still experience collisions, supporting the jury’s finding that the standard did not necessarily require the patent’s claimed “dedicated preamble.” Evolved also failed to preserve its challenge to the governing jury instruction.
The court also affirmed partial summary judgment for Samsung’s Qualcomm-chip products. Reading the 2004 amendment under California contract law, the court held that its survival provisions superseded the original agreement’s general termination clause and kept the Qualcomm covenants effective for the life of the patent. LG’s alleged failure to follow transfer procedures when selling the patent did not terminate those rights because the agreement specified no such consequence.
Finally, the court affirmed the denial of Samsung’s invalidity JMOL. Expert testimony and the parent patent’s disclosure supplied substantial evidence that the inventors possessed both a “dedicated preamble” and an “index of the dedicated preamble.” The jury was entitled to weigh the disputed testimony, and established knowledge in the art could help show how a skilled artisan would understand the disclosure.
Key Takeaways
- A patent owner relying solely on a standards-based infringement theory must prove that every possible implementation of the standard infringes the asserted claims.
- A later contract amendment’s express survival language can supersede an original agreement’s general termination provision and preserve patent-license protections after termination.
- A written-description verdict may rest on expert testimony connecting the specification to the claims, including evidence of concepts well known to skilled artisans.
Why It Matters
The nonprecedential decision illustrates the evidentiary burden facing patentees that attempt to prove infringement by mapping patent claims to an industry standard instead of directly analyzing accused products. Evidence that the standard permits even one noninfringing implementation can defeat that theory.
The opinion also underscores the importance of survival and patent-transfer language in technology licenses. Rights protecting downstream customers may continue after the broader agreement ends, particularly when an amendment expressly preserves covenants for the patent’s life.